Extrinsic 15348-1

{
  "heartbeat": {
    "blockNumber": 15347,
    "sessionIndex": 255,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x3623a586614c377434fcf87f9da6c26b0f9569920f588cf78909893f81cda73f6cbe7d382bb5841e76367ade0f853b222544ddb191a1c2893522a742c2cb5d8c"
}